Adjustable numerical control machine tool clamp

Abstract

The utility model relates to an adjustable numerical control machine tool clamp which comprises a base, a plurality of positioning grooves are formed in the base and arranged at intervals, a pair of clamping plates is arranged on the top face of the base, a through hole is formed in the center of each clamping plate, a locking assembly is rotationally installed in each through hole, and an adjusting shaft used for adjusting deflection of each locking assembly is arranged on the top of one clamping plate. A positioning block is further arranged in the positioning groove, pin holes are formed in the two ends of the top face of the clamping plate respectively, bolts are inserted into the pin holes, and threaded holes are formed in the two ends of the positioning block in a penetrating mode and locked and fixed to the bolts; the clamp can meet the machining and fixing requirements of various types of parts, adaptive adjustment can be conducted according to the sizes of the parts, the application range of the clamp is greatly widened, in the structure, the deflection angle of the parts can be accurately adjusted, and therefore numerical control machining is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool fixtures, and particularly relates to an adjustable numerical control machine tool fixture. Background Art

[0002] A numerical control machine tool is short for a numerically controlled machine tool, and is an automated machine tool equipped with a program control system. This control system can logically process a program with control codes or other symbolic instructions, and decode it, so that the machine tool operates numerically controlled and processes parts.

[0003] In the actual machining process, there are often some special parts that need to be flipped by a certain angle before machining. The corresponding fixture will have the function of adjusting the angle. For example, the Chinese patent with the publication number CN220347820U discloses a numerical control machine tool fixture with a flipping function. Its main purpose is to adjust the inclination angle of the parts by means of clamping and rotation to improve the convenience of machining.

[0004] However, in the above structure, the structure cannot accurately adjust the specific deflection angle of the parts, and only uses the clamping method for fixation. Not only is the fixation effect poor, but also when machining pipe materials or cylindrical parts, effective fixation cannot be carried out. Summary of the Utility Model

[0005] Based on the above description, the utility model provides an adjustable numerical control machine tool fixture to solve the disadvantages that the existing fixture with the function of adjusting the angle cannot accurately adjust the deflection angle, and its clamping method has a poor fixation effect and cannot effectively fix some parts such as pipe materials.

[0006] The utility model is realized by the following technical solutions:

[0007] An adjustable numerical control machine tool fixture includes a base. Multiple positioning grooves are arranged on the base at intervals. A pair of clamping plates are provided on the top surface of the base. A through hole is provided at the center of the clamping plate. A locking component is rotatably installed inside the through hole. An adjusting shaft for adjusting the deflection of the locking component is provided at the top of one of the clamping plates. A positioning block is further provided in the positioning groove. Pin holes are respectively provided at both ends of the top surface of the clamping plate and bolts are inserted. Threaded holes are provided through both ends of the positioning block and are locked and fixed with the bolts.

[0008] Further, a ball bearing is provided inside the through hole and is detachably fixedly connected with the locking component. Angle marks are also arranged around the end face of one of the clamping plates. A triangular pointer is provided on the outer side wall of the ball bearing.

[0009] Further, the locking assembly includes a connecting seat fixedly installed at the center of the ball bearing. The connecting seat is annular and hollow inside. An opening is arranged on the end face of the connecting seat and communicates with the inside of the connecting seat. A clamping block is slidably installed on each opening. An adjusting disk is also rotatably installed inside the connecting seat. A locking groove in a spiral shape is provided on the surface of the adjusting disk. The end face part of the clamping block extends towards the adjusting disk and is slidably inserted into the locking groove.

[0010] Further, a transmission gear is arranged on the back of the adjusting disk and is concentric with the adjusting disk. A driving gear is provided on one side of the transmission gear. The central shaft of the driving gear extends outwards and forms an adjusting cap on the end face of the connecting seat. A hexagonal socket recess is provided at the center of the adjusting cap.

[0011] Further, a worm gear is also sleeved on the outer wall surface of the inner ring of the ball bearing seat. The adjusting shaft is configured as a worm and is vertically arranged on one side of the worm gear. The worm gear and the adjusting shaft are meshed with each other.

[0012] Further, a flange is also provided at the bottom of the clamping plate. The width of the flange is greater than the width of the positioning groove. A rubber pad with a corrugated surface structure is also provided on the bottom surface of the flange.

[0013] Further, the positioning groove is an inverted T-shaped groove. The positioning block is also configured as an inverted T shape and the protruding part at its top is exactly flush with the top surface of the bottom plate.

[0014] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:

[0015] 1. The present application is improved based on the existing lathe fixture. A fixing structure similar to a chuck is used to replace the existing clamping structure. It can not only be applicable to the fixing requirements of various types of part processing, but also can be adaptively adjusted according to the size of the part, greatly improving the applicable range of the fixture. Moreover, in this structure, the deflection angle of the part can be accurately adjusted, so that the numerical control processing is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the base and the clamping plate in this embodiment;

[0017] Figure 2 is a schematic structural diagram of the base and the positioning block in this embodiment;

[0018] Figure 3 is a schematic structural diagram of the clamping plate in this embodiment;

[0019] Figure 4 is a schematic front structural diagram of the clamping plate in this embodiment;

[0020] Figure 5 It is a schematic exploded view of the connecting seat in this embodiment;

[0021] Figure 6 It is a schematic structural view of the driving gear and the transmission gear in this embodiment;

[0022] Figure 7 It is a schematic structural view of the worm gear and the adjusting shaft in this embodiment;

[0023] Wherein: 1. Base; 11. Positioning groove; 12. Positioning block; 2. Clamping plate; 21. Ball bearing; 22. Angle mark; 23. Worm gear; 24. Pointer; 25. Bolt; 26. Adjusting shaft; 3. Locking assembly; 31. Connecting seat; 32. Opening; 33. Clamping block; 34. Adjusting disc; 35. Driving gear; 36. Transmission gear; 37. Adjusting cap. Detailed implementation manners

[0024] To facilitate the understanding of this application, the following will describe this application more comprehensively with reference to the relevant drawings. Embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0026] Combined with Figures 1-7 As shown, an adjustable numerical control machine tool fixture includes:

[0027] Base 1, which is the substrate of the numerical control lathe, has a plurality of positioning grooves 11 opened on its top surface, and the plurality of positioning grooves 11 are arranged at intervals, and a positioning block 12 for auxiliary fixation is provided inside it;

[0028] Clamping plates 2, each two as a group, are symmetrically arranged on the top surface of the base 1 respectively, have a through hole at the center, a bolt 25 is penetrated through the top thereof, and is locked and fixed with the positioning block 12 through the bolt 25, so that the clamping plates 2 are vertically arranged on the top surface of the base 1, thereby providing auxiliary support for the machined parts;

[0029] Locking assembly 4, which is arranged at the through hole at the center of the clamping plate 2 and is used to clamp the end of the part or fix it by internal support.

[0030] Specifically; in this embodiment, the positioning groove 11 is arranged as a strip-shaped groove with an inverted T-shaped cross-section, and the positioning block 12 is correspondingly arranged as a long strip-shaped metal block with an inverted T-shaped structure, so that it can slide along the extension direction of the positioning groove 11 to cooperate with the numerical control lathe to adjust its machining position.

[0031] In the above structure, the positioning grooves 11 can be arranged in a mesh structure, that is, even if some of the positioning grooves 11 are arranged horizontally and some are arranged vertically, and the horizontally arranged positioning grooves 11 and the vertically arranged positioning grooves 11 communicate with each other to form a grid shape.

[0032] At both ends of the top surface of the clamping plate 2, pin holes are vertically penetrated, and bolts 25 are inserted into the pin holes. The bottom of the bolts 25 extends vertically downward into the positioning groove 11, and two threaded holes are correspondingly arranged on the positioning holes. The threaded holes are threadedly assembled with the bottom ends of the bolts 25. Therefore, when the bolts 25 are twisted, the positioning block 12 will move upward and press against the inner wall of the positioning groove 11. At this time, the top of the bolt 25 also just fits against the top of the clamping plate 2, and the bottom end of the bolt 25 extends downward, so as to apply a pulling force from top to bottom to lock and fix the clamping plate 2 to the top surface of the base 1.

[0033] In addition, in the above structure, the clamping plate 2 and the positioning hole are connected by two bolts 25. Therefore, the clamping plate 2 should be perpendicular to the positioning groove 11, which can ensure that the machined parts between the two clamping plates 2 are horizontal.

[0034] To further improve the stability of the clamping plate 2, a flange should also be provided at the bottom of the clamping plate 2. The width of the flange should be much larger than the width of the positioning groove 11, that is, the bottom area is enlarged to enhance its stability. Moreover, a rubber pad is provided on the bottom surface of the flange. The rubber pad is a buffer material. That is, when the locking adjustment is carried out, the rubber pad will be extruded to additionally enhance the downward pressure on the clamping plate 2. And the bottom surface of the rubber pad is arranged in a corrugated structure, which can form a large number of sealed spaces by extrusion to further improve the tightness with the top surface of the base 1.

[0035] Angle marks 22 are also arranged around the edge of the through hole of the clamping plate 2. In this embodiment, 36 marks can be set, that is, the angle between every two marks is 10° (according to the actual situation, other numbers can also be used for marking). And a ball bearing 21 is installed inside the through hole. The inner ring of the ball bearing 21 protrudes from the clamping plate 2, and a triangular pointer 24 is provided on the outer wall of the protruding part of the inner ring. The pointer 24 corresponds to the angle marks 22 to quickly judge the deflection angle of the machined parts.

[0036] The locking component 4 includes a connecting seat 31, an adjusting disk 34, and a clamping block 33. The connecting seat 31 is annular and sleeved inside the ball bearing 21, and its inner ring surface is fixedly clamped with the outer wall of the connecting seat 31. Therefore, the entire connecting seat 31 can rotate flexibly on the clamping plate 2.

[0037] The inside of the connecting seat 31 is hollow, and an adjusting disk 34 is movably installed inside. The surface of the adjusting disk 34 is provided with locking grooves in a spiral shape. The top surface of the connecting seat 31 is provided with 4 rectangular openings 32, and each opening 32 communicates with the inside of the connecting seat 31 (according to actual requirements, the number of openings can also be set to 3, 6, etc.). A clamping block 33 is arranged on each opening 32. Part of the clamping block 33 extends towards the inside of the connecting seat 31, and its protruding part is slidably inserted into the limiting groove.

[0038] The above structure is similar to the internal limiting structure of the existing three-jaw chuck. By driving the limiting grooves on the surface of the adjusting disk 34, the clamping block 33 is forced to move inside the opening 32 by the arc-shaped inner wall, so as to control the synchronous clamping or outward expansion of the 4 clamping blocks 33, so as to be able to clamp or internally support and lock the processed parts. Moreover, this structure has a self-locking function and a centering function. The reverse thrust between the clamping block 33 and the locked part will not cause the adjusting disk 34 to reverse, and the locked part will always be in the center position of the connecting seat 31.

[0039] To facilitate the expansion and gathering between the above-mentioned clamping blocks 33, a transmission gear 36 should also be provided on the back of the adjusting disk 34. A driving gear 35 is meshed on one side of the driving gear 35, and the central axis of the driving gear 35 extends outwards to the back of the connecting seat 31 to form an adjusting cap 37. An internal hexagonal groove is provided at the center of the adjusting cap 37.

[0040] Since the connecting seat 31 can move through the structure of the ball bearing 21, during the adjustment process, other components need to be used to lock it additionally before the adjusting disk 34 can be driven to rotate smoothly through the adjusting cap 37.

[0041] Based on the above requirements, in this embodiment, an adjusting shaft 26 is vertically arranged inside the clamping plate 2, and a worm gear 23 is sleeved on the outer side wall of the inner ring of the ball bearing 21. The adjusting shaft 26 adopts a worm structure and meshes with the worm gear 23. Therefore, the ball bearing 21 can be locked by using the self-locking structure of the worm gear 23. Whenever the adjusting shaft 26 is twisted, the ball bearing 21 can be driven to rotate by a certain angle for the staff to perform high-precision processing adjustment.

[0042] In addition, the above structure can also lock the ball bearing 21, so that it is convenient for the staff to twist the adjusting cap 37 with an Allen wrench, thereby controlling the clamping block 33 to lock and fix the machined part.

[0043] In this embodiment, the top end of the positioning block 12 should be able to extend to be flush with the top surface of the base 1, so as to minimize the gap with the positioning groove 11, in order to enhance stability.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention.

Claims

1. An adjustable CNC machine tool fixture, characterized in that: The invention comprises a base (1), wherein a plurality of positioning grooves (11) are arranged at intervals on the base (1), a pair of card plates (2) are arranged on the top surface of the base (1), a through hole is arranged at the center of the card plate (2), a locking assembly (3) is rotatably mounted inside the through hole, and an adjusting shaft (26) for adjusting the deflection of the locking assembly (3) is arranged on the top of one of the card plates (2); a positioning block (12) is also arranged in the positioning groove (11), pin holes are arranged at both ends of the top surface of the card plate (2) and bolts (25) are inserted therein, and threaded holes are arranged at both ends of the positioning block (12) and are locked and fixed with the bolts (25).

2. According to the adjustable CNC machine tool fixture described in claim 1, it is characterized in that: A ball bearing (21) is arranged inside the through hole and is detachably fixedly connected to the locking assembly (3). An angle mark (22) is also arranged around the end surface of one of the clamping plates (2). A triangular pointer (24) is arranged on the outer side wall of the ball bearing (21).

3. According to the adjustable CNC machine tool fixture described in claim 2, it is characterized in that: The locking assembly (3) comprises a connecting seat (31) fixedly mounted at the center of the ball bearing (21); the connecting seat (31) is annular and hollow inside; an opening (32) is arranged on the end surface of the connecting seat (31) and communicates with the inside of the connecting seat (31); a clamping block (33) is slidably mounted on each of the openings (32); an adjusting disk (34) is rotatably mounted inside the connecting seat (31); a vortex-shaped locking groove is provided on the surface of the adjusting disk (34); an end surface portion of the clamping block (33) extends toward the adjusting disk (34) and is slidably inserted into the locking groove.

4. The adjustable CNC machine tool fixture according to claim 3, characterized in that: A transmission gear (36) is arranged on the back of the adjustment disk (34) and is arranged concentrically with the adjustment disk (34), and a driving gear (35) is provided on one side of the transmission gear (36). The central axis of the driving gear (35) extends outward and an adjustment cap (37) is formed on the end surface of the connecting seat (31), and a hexagonal groove is provided at the center of the adjustment cap (37).

5. The adjustable CNC machine tool fixture according to claim 4, characterized in that: A worm wheel (23) is sleeved on the outer wall surface of the inner ring of the ball bearing (21) seat, and the adjustment shaft (26) is configured as a worm and is vertically arranged on one side of the worm wheel (23), and the worm wheel (23) and the adjustment shaft (26) are meshed with each other.

6. The adjustable CNC machine tool fixture according to claim 1, characterized in that: The bottom of the clamping plate (2) is also provided with a flange, the width of the flange is greater than the width of the positioning groove (11), and a layer of rubber pad with a corrugated surface structure is also provided on the bottom surface of the flange.

7. The adjustable CNC machine tool fixture according to claim 1, characterized in that: The positioning groove (11) is an inverted T-shaped groove, and the positioning block (12) is also arranged in an inverted T-shape with the protruding portion at the top thereof being arranged flush with the top surface of the bottom plate.

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